Display image for an MP3 player



FIG. 1 is a perspective view of a display image for an MP3 player; and,

FIG. 2 is a front view of a display image for an MP3 player of FIG. 1.

The broken line showing of portions of an MP3 player is included for the purpose of illustrating environmental structure and forms no part of the claimed design. 

The ornamental design for a display image for an MP3 player, as shown and described. 